Circuit breaker and panelboard

Claim 1

A PANELBOARD COMPRISING, AN ENCLOSURE HAVING A BACK WALL, END WALLS, AND RECTANGULAR SIDE WALLS, CIRCUIT BREAKER MOUNTING AND CONNECTING MEANS FOR AT LEAST ONE ROW OF MODULAR CASED BRANCH CIRCUIT PROTECTIVE DEVICES, SAID MEANS INCLUDING A BUS ASSEMBLY HAVING PLURAL BUS BARS WITH AN INSULATOR, SAID BUS BARS HAVING RESPECTIVE INPUT ENDS SPACED FROM AN ADJACENT END WALL OF SAID ENCLOSURE, SAID INSULATOR HAVING A HOUSING PORTION FORMING RESPECTIVE PARTIAL ENCLOSURES ABOUT SAID INPUT ENDS, SAID BUS ASSEMBLY INCLUDING A PLURALITY OF TERMINALS FOR ENGAGEMENT BY SAID BRANCH CIRCUIT DEVICES CARRIED BY SAID INSULATOR AND CONNECTED TO SAID BUS BARS THEREIN, AND A MAIN CIRCUIT INTERRUPTER HAVING A PEDESTAL PORTION AND A HOUSING PORTION EXTENDING UPWARDLY THEREFROM AND DISPOSED BETWEEN THE OPPOSITE ENDS OF THE PEDESTAL PORTION AND ADJACENT ONE SIDE THEREOF, SAID PEDESTAL PORTION HAVING AN EXTERNAL CONFIGURATION COMPLEMENTARY TO SAID BUS ASSEMBLY HOUSING PORTION, A PAIR OF LOAD TERMINALS DISPOSED ON SAID PEDESTAL PORTION AT SAID PEDESTAL PORTION AST THE A PAIR OF LINE TERMINALS ON SAID PEDESTAL PORTION AT THE OPPOSITE SIDES OF SAID UPSTANDING INTERRUPTER HOUSING PORTION, A TWO-POLE CIRCUIT INTERRUPTER MECHANISM IN SAID INTERRUPTER HOUSING PORTION AND EXTENDING DOWNWARD INTO SAID PEDESTAL PORTION, HIGH-CURRENT CONDUCTORS EXTENDING FROM SAID LINE TERMINALS INTO SAID PEDESTAL PORTION, TOWARD THE OPPOSITE SIDE OF SAID PEDESTAL PORTION AND CONNECTED TO RESPECTIVE POLES OF SAID CIRCUIT INTERRUPTER MECHANISM, SAID MAIN CIRCUIT INTERRUPTER BEING SECURED TO SAID BUS ASSEMBLY HOUSING PORTION AND SAID LOAD TERMIBALES BEING CONNECTED TO SAID INPUT ENDS OF SAID BUS BARS.